So I have a question on upgrading from SD to HD in my living room. I currently have a R15-30 DVR in my living room that I would like to upgrade to a HD DVR. The equipment I have in my system is as follows. R15-30 in living room, H21/200 in bedroom, Slimline dish, and a MS6X8WB-Z-switch. I have 4 cables from the dish to the switch. I have 2 cables from the switch to the living room dvr. And 1 cable from switch to bed room. So my thought is I should be able to simply change out the living room dvr from a SD to a HD DVR without having to run any more cables or changing out the switch. Is this correct? With the current cable runs and switch what are my options?